/usr/share/doc/libapm-dev/changelog.Debian.gz is in libapm-dev 3.2.2-14build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libapm-dev/../libapm1/changelog.Debian.gz
/usr/share/doc/libapm-dev/../libapm1/changelog.Debian.gz